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Mrrafil [7]
3 years ago
5

Please help! Will give brainliest, also 20 points, correct answers only!!

Mathematics
1 answer:
ikadub [295]3 years ago
7 0

Answer:

18 minutes for each exhibit.

Step-by-step explanation:

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Answer C

Step-by-step explanation: lol idk

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What is the length of segment AB?<br> 7<br> 9<br> 18<br> 25
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Nobody likes a short, one-word-answer. Let’s make sure other people understand everything.

Step-by-step explanation:

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A student has started a lawn care business. He charges $15 per hour to mow lawns and $20 per hour for gardening. Because he is s
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:)

Step-by-step explanation:

15x=300

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20x=300

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8 0
3 years ago
Use the diagram shown. There are two lines which intersect each other and making angles 1 and 2. The opposite angles to 1 is 3,
Rufina [12.5K]

Answer:

I think that A, B, and C are correct.

Step-by-step explanation:

1. Since measures 2 and 3 are a linear pair, they equal 180 degrees. A is correct.

2. Since measures 3 and 4 are also a linear pair, they too equal 180 degrees. B is correct.

3. Measures 2 and 3 are already established to be 180 degrees (check answer 1) , and measures 3 and 4 are also 180 degrees (check answer 2). Since they are both 180 degrees, they are congruent (equal), so C is correct.

D is NOT correct. Measures 1 and 3 are equal because they are vertical angles. We also know that they are acute angles (less than 90) so adding them together will equal less than 180 degrees.

Measures 2 and 4 are equal because they are vertical angles, and they are obtuse (more than 90 degrees). Adding them together will equal more than 180 degrees.

Logic tells us that something less than 180 CANNOT be equal to something more than 180. This proves that 2 and 4   and   1 and 3 are not congruent.

D is WRONG

8 0
2 years ago
A particular curve is represented parametrically by x=cost, y=−sint, t∈[0,2π]. (a) As t increases on [0,2π], in which direction
cestrela7 [59]

Answer:

a) clockwise sense

b)  x² + y² = 1

c) y ∈ [0,1]

Step-by-step explanation:

a) x = cos (t)       y = -sin (t)

for t ∈ [ 0 , 2π ]

for t = 0   point  P  is    x = cos (0)   =  1   y = -sin (0)   y = 0

The point is on the x axis

Now let´s see what happens for t = π/4  

x = cos (π/4)    x = √2/2    and   y = - sin (π/4)    y = - √2/2

Note  π/4 is 45°

The coordinates of the new point P ´(t = π/4) are in the fourth quadrant

that means the point is moving clockwise sense.

b) x = cos(t)

   y = -sin(t)

Squaring on both sides of each equation we get:

x²  = cos²t

y²  = sin²(t)

Adding side by side

x²  +  y² = cos²t  + sin²t

x²  +  y² = 1

Values for y are    y  ( 0 , 1)

8 0
3 years ago
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